|This evergreen shrub grows to a height of 6 or 10 feet tall and a width of 5 to 8 feet. Though unusual, some cultivars may reach 15 or 20 feet with age. Foliage is dark green and leathery, with oval leaves, lending a course texture to the landscape. Flowers range in color from lilac to rose with green or brown markings in the throat. As with any plant in the Ericaceae family, the rhododendron must have well-drained, acid soil that is rich is organic matter. Always plant high. After flowering, remove spent blooms to encourage stronger flowering the following year.